Download 1 - Liebert

1.0 GENERAL
1.1 SUMMARY
These specifications describe requirements for an environmental control system. The system shall be designed to maintain
temperature and relative humidity conditions within the room. The manufacturer shall design and furnish all equipment to be fully
compatible with heat dissipation requirements of the site.
1.2 DESIGN
REQUIREMENTS
The environmental control system shall be a Liebert Himod factory assembled unit. It shall be specifically designed for service from
the front or top of the unit. The system shall be designed for draw-through air arrangement to insure even air distribution to the entire
face area of the coil.
Each system shall be capable of handling ____ CFM (CMH) at ____ inches of water (kPa) external static pressure with (down
discharge air flow) (up discharge air flow with front return) pattern. It shall have a total cooling capacity of _____ BTU/HR (kW),
sensible cooling capacity of _____ BTU/HR (kW), based on the entering air condition of ____ºF (ºC) dry bulb, and ____ ºF (ºC) wet
bulb. These units are to be supplied with ____ Volt, 3 phase, 60 Hz power supply. The humidifier shall have a capacity of ____
BTU/HR (kW). The main fan motors shall be ______ HP (kW) each.
1.3 SUBMITTALS
Submittals shall be provided with the proposal and shall include: Single-Line Diagrams; Dimensional, Electrical, and Capacity data;
Piping and Electrical Connection Drawings.
2.0 PRODUCT
2.1 ALL SYSTEMS
2.1.1 Cabinet Construction
The exterior panels shall be double skinned and lined with a minimum of 1.5 lbs. (.68 kg) insulation. The exterior panels shall be 18
gauge and shall be powder painted. The cabinet shall be designed so that all components are serviceable from the front or top of the
unit. The manual disconnect switch shall be mounted in the high voltage section of the electrical panel. The switch shall be accessible
from the outside of the unit with the door closed, and prevent access to the high voltage electrical components until switched to the
"OFF" position.
2.1.2 Fan and
Motor Section
The fans shall be direct drive, single inlet backwardly curved, centrifugal type positioned to draw air over the coil to ensure even air
distribution and maximum coil performance. The fan impeller is statically and dynamically balanced and equipped with permanently
lubricated bearings. The fans shall be mounted on vibration absorbing rubber supports to reduce vibration. The motor shall have a
high and low operating speed and internal thermal protection. A field adjustable autotransformer shall be provided for modifying unit
operating speeds. The environmental control unit rated sound level shall be ____dBA sound power at the unit supply discharge with
the fans and compressor on, and shall be ____dBA sound pressure at 2 meters in front of the unit, 1 meter height in free field
conditions with the fans and compressor on.
2.1.3 Filter
The filter shall be 4 inches (102 mm) thick and rated no less than ____ % (20%, 30%, 60-65%) efficiency based on ASHRAE 52.1.
Inserts shall be provided to minimize the passage of unfiltered air between the individual filters.
2.1.4 Advanced Microprocessor Control (Standard)
The Advanced Control processor shall be microprocessor based with a front monitor LCD display panel and control keys for user
inputs. The controls shall be menu driven with on-screen prompts for easy user operation. The system shall allow user review and
programming of temperature and humidity setpoints, alarm parameters, and setup selections including choice of control type. A
password shall be required to make system changes. For all user selections, the range of acceptable input (temperature, humidity, or
time delay) shall be displayed on the monitor screen. The system shall provide monitoring of room conditions, operational status in %
of each function, component run times, date and time and four analog inputs from sensors provided by others.
Control
The control system shall allow programming of the following room conditions:
Temperature Setpoint: 65 to
85ºF (18-29ºC)
Temperature Sensitivity: +1 to
+9.9ºF (0.6 to 5.6ºC) in 0.1º
increments
Humidity Setpoint: 20 to 80%
RH
SL-12020 (R 11/01)
Himod Guide Specification
Rev. 02
Humidity Sensitivity: +1 to
+30% RH
All setpoints shall be adjustable from the individual unit front monitor panel. Temperature and Humidity Sensors shall be capable of
being calibrated using the front monitor panel controls to coordinate with other temperature and humidity sensors in the room.
Predictive Humidity Control
The microprocessor shall calculate the moisture content in the room and prevent unnecessary humidification and dehumidification
cycles by responding to changes in dewpoint temperature.
Compressor Short-Cycle Control
The control system shall include a program to prevent compressor short-cycling.
System Auto-Restart
For start-up after power failure, the system shall provide automatic restart with a programmable (up to 9.9 minutes in 6-second
increments) time delay. Programming can be performed either at the unit or from the central site monitoring system.
Sequential Load Activation
During start-up, or after power failure, the microprocessor shall sequence operational load activation to minimize inrush current.
Systems allowing multiple loads to start simultaneously are unacceptable.
Econ-O-Coil Flush Cycles
Econ-O-Cool coils (if unit is so equipped) shall be automatically flushed to prevent the buildup of contaminants. Systems without this
feature shall include the necessary devices to bypass fluid into the coil on a programmed basis.
Front Monitor Display Panel
The microprocessor shall provide a front monitor LCD backlit display panel with 4 rows of 20 characters with adjustable contrast. This
display (along with five front mounted control keys) shall be the only operator interface required to obtain all available system
information such as room conditions, operational status, alarms, control and alarm setpoints, and all user selections including alarm
delays, sensor calibration, DIP switch selections, and diagnostics. All indicators shall be in language form. No symbols or codes shall
be acceptable.
Alarms
The microprocessor shall activate an audible and visual alarm in event of any of the following conditions:
High Temperature
Low Temperature
High Humidity
Low Humidity
Short Cycle
Compressor Overload(Optional)
Main Fan Overload
Humidifier Problem
High Head Pressure
Change Filter
Loss of Air Flow
Low Suction Pressure
Loss of Power
Custom Alarm (#1 to #4)
Custom alarms are four customer accessible alarm inputs to be indicated on the front panel. Custom alarms can be identified with
prepared (programmed) alarm labels for the following frequently used inputs:
Water Under Floor
Smoke Detected
Standby GC Pump On
User customized text can be entered for two of the four custom alarms. Each alarm (unit and custom) can be separately enabled or
disabled, selected to activate the common alarm, and programmed for a time delay of 0 to 255 seconds.
Audible Alarm
The audible alarm shall annunciate any alarm that is enabled by the operator.
Common Alarm
A programmable common alarm shall be provided to interface user selected alarms with a remote alarm device.
Remote Monitoring
All alarms shall be communicated to the Liebert site monitoring system with the following information: date and time of occurrence, unit
number, and present temperature and humidity.
SL-12020 (R 11/01)
Himod Guide Specification
Rev. 02
Analog Inputs
The system shall include four customer accessible analog inputs for sensors provided by others. The analog inputs shall accept a 4 to
20 mA signal. The user shall be able to change the input to 0 to 5 vdc or 0 to 10 vdc if desired. The gains for each analog input shall
be programmable from the front panel. The analog inputs shall be able to be monitored from the front panel.
Diagnostics
The control system and electronic circuitry shall be provided with self-diagnostics to aid in troubleshooting. The microcontroller board
shall be diagnosed and reported as pass/not pass. Control inputs shall be indicated as on or off at the front monitor panel. Control
outputs shall be able to be turned on or off from the front monitor panel without using jumpers or a service terminal. Each control
output shall be indicated by an LED on a circuit board.
Data Collection
The control system shall maintain accumulative operating hours of compressor, reheat, humidifier, fan motor, and Econ-O-Coil. The
ten most recent alarms shall also be retained.
Communications
The microprocessor shall be compatible with all Liebert remote monitoring and control devices.
2.1.4 Advanced Microprocessor Control with Graphics (Optional)
The optional Advanced control processor shall be microprocessor based with a front monitor dot matrix display panel and control keys
for user inputs. The controls shall be menu driven with on-screen prompts for easy user operation. The system shall allow user review
and programming of temperature and humidity setpoints, alarm parameters, and setup selections including choice of control type. A
password shall be required to make system changes. For all user selections, the range of acceptable input (temperature, humidity, or
time delay) shall be displayed on the monitor screen. The system shall provide monitoring of room conditions, operational status in %
of each function, component run times, date and time, and four analog inputs from sensors provided by others.
Control
The control system shall allow programming of the following room conditions:
Temperature Setpoint: 65 to
85ºF (18-29ºC)
Temperature Sensitivity: +1 to
+9.9ºF (0.6 to 5.6ºC) in 0.1º
increments
Humidity Setpoint: 20 to 80%
RH
Humidity Sensitivity: +1 to
+30% RH
All setpoints shall be adjustable from the individual unit front monitor panel. Temperature and Humidity Sensors shall be capable of
being calibrated using the front monitor panel controls to coordinate with other temperature and humidity sensors in the room.
Predictive Humidity Control
The microprocessor shall calculate the moisture content in the room and prevent unnecessary humidification and dehumidification
cycles by responding to changes in dewpoint temperature.
Compressor Short-Cycle Control
The control system shall include a program to prevent compressor short-cycling.
System Auto-Restart
For start-up after power failure, the system shall provide automatic restart with a programmable (up to 9.9 minutes in 6-second
increments) time delay. Programming can be performed either at the unit or from the central site monitoring system.
Sequential Load Activation
During start-up, or after power failure, the microprocessor shall sequence operational load activation to minimize inrush current.
Systems allowing multiple loads to start simultaneously are unacceptable.
Econ-O-Coil Flush Cycles
Econ-O-Cool coils (if unit is so equipped) shall be automatically flushed to prevent the buildup of contaminants. Systems without this
feature shall include the necessary devices to bypass fluid into the coil on a programmed basis.
Front Monitor Display Panel
The microprocessor shall provide a front monitor 240 x 120 dot matrix display panel with adjustable backlighting. This display (along
with five front mounted control keys) shall be the only operator interface required to obtain all available system information such as
room conditions, operational status, graphical data, alarms, control and alarm setpoints, and all user selections including alarm delays,
sensor calibration, DIP switch selections, and diagnostics. All indicators shall be in language form. No symbols or codes shall be
acceptable.
Alarms
The microprocessor shall activate an audible and visual alarm in event of any of the following conditions:
SL-12020 (R 11/01)
Himod Guide Specification
Rev. 02
High Temperature
Low Temperature
High Humidity
Low Humidity
Short Cycle
Compressor Overload (Optional)
Main Fan Overload
Humidifier Problem
High Head Pressure
Change Filter
Loss of Air Flow
Low Suction Pressure
Loss of Power
Custom Alarm (#1 to #4)
Custom alarms are four customer accessible alarm inputs to be indicated on the front panel. Custom alarms can be identified with
prepared (programmed) alarm labels for the following frequently used inputs:
Water Under Floor
Smoke Detected
Standby GC Pump On
Loss of Water Flow
Standby Unit On
User customized text can be entered for all four custom alarms. Each alarm (unit and custom) can be separately enabled or disabled,
selected to activate the common alarm, and programmed for a time delay of 0 to 255 seconds.
Audible Alarm
The audible alarm shall annunciate any alarm that is enabled by the operator.
Common Alarm
A programmable common alarm shall be provided to interface user selected alarms with a remote alarm device.
Remote Monitoring
All alarms shall be communicated to the Liebert site monitoring system with the following information: date and time of occurrence, unit
number, and present temperature and humidity.
Analog Inputs
The system shall include four customer accessible analog inputs for sensor provided by others. The analog inputs shall accept a 4 to
20 mA signal. The user shall be able to change the input to 0 to 5 vdc or 0 to 10 vdc if desired. The gains for each analog input shall
be programmable from the front panel. The analog inputs shall be able to be monitored form the front panel.
Diagnostics
The control system and electronic circuitry shall be provided with self-diagnostics to aid in troubleshooting. The microcontroller board
shall be diagnosed and reported as pass/not pass. Control inputs shall be indicated as on or off at the front monitor panel. Control
outputs shall be able to be turned on or off from the front monitor panels without using jumpers or a service terminal. Each control
output shall be indicated by an LED on a circuit board.
Data Collection
The control system shall maintain accumulative operating hours of compressor, reheat, humidifier, fan motor, Econ-O-Coil, and heat
rejection. The sixty most recent alarms shall also be retained.
Graphing
The control shall display the following graphical data:
Temperature, humidity, analog inputs, component operation status by hour, water detection floor plan, operating status.
Communications
The microprocessor shall be compatible with all Liebert remote monitoring and control devices.
2.1.5 Steam Generating Humidifier (Standard)
The environmental control system shall be equipped with a steam generating humidifier that is controlled by the microprocessor
control system. It shall be complete with disposable canister, all supply and drain valves, steam distributor, and electronic controls.
The need to change canister shall be annunciated on the microprocessor control panel. The humidifier shall have a capacity of 14
lbs/hr (6.4 kg/h).
2.1.6 Electric Reheat (Standard)
The environmental control system shall be equipped with low-watt density, aluminum finned electric reheat coils that are controlled by
the microprocessor control system. The reheat section shall include agency approved safety switches to protect the system from
overheating. The rated capacity of the reheat coils shall be 47,100 BTU/HR (10.5 kW), controlled in 2 stages.
2.1.7 Base Module (Optional)
SL-12020 (R 11/01)
Himod Guide Specification
Rev. 02
The base module shall be supplied to elevate the upflow room unit 12 in. (305 mm) to allow piping to enter the base of the unit when a
raised floor is not installed. It shall be consist of a heliarc welded frame and removable exterior steel panels powder painted to match
the unit.
2.1.7 Floor Stand (Optional)
The floorstand shall be constructed of heliarc welded tubular steel frame. The floorstand shall be coated using an autodeposition
process to protect against corrosion. The floorstand shall have adjustable legs with vibration isolation pads. The floorstand shall be (9
in. (23 cm)) (12 in. (30 cm)) (15 in. (38 cm)) (18 in. (46 cm)) (21 in. (53 cm)) (24 in. (61 cm)) high.
2.1.8 Turning Vane (Optional)
The turning vane shall be designed to mount in the factory supplied floorstand and direct air either to the front or rear of the unit.
2.1.9 Plenum (Optional)
The unit shall be supplied with a (front air discharge) (ducted) plenum. The plenum shall be (19.6 in. (500 mm)) (23.6 in. (600 mm))
(35.4 in. (900 mm)) high, constructed of insulated double skin panels powder painted to match the room unit.
2.1.10 Remote Sensors (Optional)
The unit shall be supplied with remote temperature and humidity sensors. The sensors shall be connected to the unit by a (30 ft. (9 m))
(60 ft. (18 m)) (90 ft. (27 m)) (120 ft. (36 m)) (150 ft. (45 m)) shielded cable.
2.1.11 Firestat (Optional)
The firestat shall immediately shut down the system when thigh temperatures are detected. The firestat shall be mounted in the
electrical panel with the sensing element in the return air.
2.1.12 Smoke Detector (Optional)
The smoke detector shall immediately shut down the environmental control system and activate the alarm system when activated.
The smoke detector shall be mounted in the electrical panel with the sensing element in the return air compartment.
2.1.13 Condensate Pump (Optional)
The condensate pump shall have the capacity of ____ GPH (l/h) at ___ ft. (m) head @ ____ V 60 Hz. It shall be complete with dual
float switch, pump, motor assembly, and reservoir, and shall be mounted outside of the unit.
2.1.14 Liqui-Tect Sensors (Optional)
(Max. of two per unit)
Provide (1) (2) solid state water sensors under the raised floor.
2.1.15 Temperature and Humidity Recorder (Optional)
Provide a 7-day/24 hour temperature and humidity recorder of the full scope, two pen, surface mounted type with 100 recording charts,
one red and one blue bottle or recording ink. Recorder shall have a 110 volt, single phase, 60 Hz power supply.
2.1.16 Fresh Air Kit (Optional)
The environmental control system shall be equipped with a field installed fresh air kit to allow field connection of pre-conditioned fresh
air. The fresh air kit consists of a nominal 4" (102 mm) diameter duct collar connection, filter and 30 ft. (9 m) of flexible hose.
2.1.17 SiteScan Site Monitoring System
(Optional)
Provide a SiteScan monitor system with the Himod. The SiteScan shall have the capability to monitor and change (at the user
direction) the temperature and humidity setpoints and sensitivities of each unit. The printer shall provide the user with chronological
alarm information. It shall also be capable of being programmed to print out environmental conditions or operating modes at each unit.
2.1 DIRECT
EXPANSION SYSTEMS
Direct Expansion Coil
The evaporator coil shall have 16 sq. ft. (1.49 sq. m) face area, ____ rows deep. It shall be configured as a slab coil and be
constructed of copper tubes and aluminum fins and has a maximum face velocity of ____ fpm. (m/s) at ____ CFM (CMH). The coil
shall be provided with a stainless steel drain pan.
Refrigeration System
The refrigeration system shall consist of a high efficiency scroll compressor, hot gas bypass, crankcase heater, pressure safety
switches, externally equalized expansion valve, and filter drier. The system shall be designed for use with (R407C) (R22) refrigerant.
2.2.1 Air Cooled
SL-12020 (R 11/01)
Himod Guide Specification
Rev. 02
Pump Down Control
A liquid line solenoid valve shall be provided for pump down control.
2.2.1 Dual Cool with Air Cooled
Pump Down Control
A liquid line solenoid valve shall be provided for pump down control.
Dual Cooling
Source Coil
The dual-cooling source coil shall be constructed with copper tubes and aluminum fins. It shall be located in the return air, before the
evaporator coil. The dual-cooling source coil shall be rated at ____ BTU/HR (kW) sensible cooling capacity with 45ºF (7.2ºC) entering
water temperature. The dual cooling source coil shall require ____ GPM (l/s) of chilled water and the pressure drop shall not exceed
____ PSI (kPa).
2.2.1.2 Condenser
Propeller Fan Condenser (Standard)
The Liebert manufactured air cooled condenser shall be the low profile, slow speed, direct-drive, propeller-fan type. The condenser
shall be constructed of aluminum and contain a copper tube, aluminum fin coil with an integral electric control panel. The system shall
be designed for ____ ºF (ºC) ambient. The air cooled condenser shall have a ____ Volt, ____ phase 60 Hz power supply.
Fan Speed Control (FSC) Head Pressure Control (Standard)
The winter control system for the air cooled condenser shall be Liebert Fan Speed Control (FSC). The variable speed motor shall turn
on at 10% of the supply voltage and modulate in response to head pressure to a full speed of 1050 RPM. It shall be designed with ball
bearings, permanent lubrication, and internal overload protection. The control system shall be complete with transducers, thermostats
and electrical control circuit, factory pre-wired and tested in an integral control panel. The transducer shall automatically sense the
head pressure of the compressor and control the variable speed fan on the air cooled condenser to properly maintain the head
pressure. The fan speed control system shall provide positive start-up and operation in ambient temperature as low as -20ºF (-29ºC).
Included with the fan speed control system shall be a solid state winter start kit as an integral feature of the electronic control panel.
Lee-Temp Head Pressure Control (Optional)
The winter control system for the air cooled condenser shall be "Lee-Temp". The Lee-Temp system shall allow start-up and positive
head pressure control with ambient temperatures as low as -30ºF
(-34.4ºC). The Lee-Temp package shall include: insulated receiver, pressure relief valve, head pressure three-way control valve, and
rotalock valve for isolating the refrigerant charge. The Lee-Temp receiver shall be factory insulated and mounted ready for the field
connection to the air cooled condenser. The Lee-Temp heater shall be (150) (300) Watt and require a separate power supply of (115)
(230) Volt, single phase, 60 Hz.
Piggyback Condenser (Optional)
The system shall be supplied with a piggyback condenser. The condenser shall be constructed of steel with frame coated using the
autophoretic® process, and panels powder coated to protect against corrosion. The coil shall be copper tube with aluminum fins. The
heavy duty fan shall be the centrifugal type, double width, double inlet. The 1750 RPM fan motor shall be mounted on an adjustable
base, and equipped with an adjustable motor pulley. A Liebert Lee-Temp head pressure control system shall be designed for -30ºF
(-34.4ºC) ambient winter operation. The condenser shall be designed for ____ ºF (ºC) ambient. The air cooled condenser shall have
a _____ Volt, 3 phase, 60 Hz power supply.
2.2.1 Glycol Cooled
Glycol Condenser
The glycol system shall be equipped with a brazed plate condenser having a total pressure drop of ____ ft. of water (kPa) and a flow
rate of ____ GPM (l/s) with ____ºF (ºC) entering glycol temperature with a ____% (ethylene) (propylene) glycol solution.
2-Way Fluid Regulating Valve with Bypass (Standard)
The condenser circuit shall be pre-piped with a head-pressure actuated 2-way regulating valve with bypass.
3-Way Fluid Regulating Valve with Bypass (Optional)
The condenser circuit shall be pre-piped with a head pressure actuated 3-way regulating valve.
Design Pressure
The condenser glycol circuit shall be designed for a pressure of [(150 PSI (1034 kPa)) (350 PSI (2413 kPa))].
2.2.1 Dual Cool with Glycol Cooled
Glycol Condenser
SL-12020 (R 11/01)
Himod Guide Specification
Rev. 02
The glycol system shall be equipped with a brazed plate condenser having a total pressure drop of ____ ft. of water (kPa) and a flow
rate of ____ GPM (l/s) with ____ºF (ºC) entering glycol temperature with a ____% (ethylene) (propylene) glycol solution.
2-Way Fluid Regulating Valve with Bypass (Standard)
The condenser circuit shall be pre-piped with a head-pressure actuated 2-way regulating valve with bypass.
3-Way Fluid Regulating Valve with Bypass (Optional)
The condenser circuit shall be pre-piped with a head pressure actuated 3-way regulating valve.
Design Pressure
The condenser glycol circuit shall be designed for a pressure of [(150 PSI (1034 kPa)) (350 PSI (2413 kPa))].
Dual Cooling Source Coil
The dual-cooling source coil shall be constructed with copper tubes and aluminum fins. It shall be located in the return air, before the
evaporator coil. The dual-cooling source coil shall be rated at ____ BTU/HR (kW) sensible cooling capacity with 45ºF (7.2ºC) entering
water temperature. The dual cooling source coil shall require ____ GPM (l/s) of chilled water and the pressure drop shall not exceed
____ PSI (kPa).
2.2.1 GLYCOOL Systems
GLYCOOL Coil
The GLYCOOL coil shall be constructed of copper tubes, and aluminum fins and be located upstream of the evaporator coil. The coil
shall be rated at ____ BTU/HR (kW) sensible cooling capacity with a 45ºF (7.2ºC) entering glycol solution temperature. The
GLYCOOL coil shall require ____ GPM (l/s) at ____ ft. of head (kPa), and operation on ____ Volt, ___ phase, 60 Hz power supply.
3-Way GLYCOOL Valve
The GLYCOOL coil shall be equipped with a fully proportional 3-way control valve. This motorized control valve shall control the
amount of flow to the GLYCOOL coil and maintain constant temperature and relative humidity.
Glycol Condenser
The glycol system shall be equipped with a brazed plate condenser having a total pressure drop of ____ feet of water (kPa) and a flow
rate of ____ GPM (l/s), with ____ ºF (ºC) entering glycol temperature with a ____% (ethylene) (propylene) glycol solution.
3-Way Fluid Regulating Valve
The condenser circuit shall be pre-piped with a head pressure actuated 3-way fluid regulating valve.
Design Pressure
The GLYCOOL coil/condenser circuit shall be designed for a pressure of [(150 PSI (1034 kPa)) (350 PSI (2413 kPa))].
Comparator Circuit
The system shall be equipped with a microprocessor controlled comparator sensor that permits free-cooling operation whenever
entering glycol temperature is below return air temperature.
2.2.1.2 Drycooler & Pump(s)
Propeller Fan Drycooler (Standard)
The Liebert manufactured drycooler shall be the low profile, slow speed, direct drive propeller fan type. The drycooler shall be
constructed of aluminum and contain a copper tube aluminum fin coil with an integral electric control panel. The drycooler shall be
designed for ____ ºF (ºC) ambient.
Single Glycol Pump Package (Standard)
This system shall be provided with a centrifugal pump mounted in a weatherproof and vented enclosure. The pump shall be rated for
____ GPM (l/s) at _____ ft. of head (kPa), and operate on ____ Volt, 3 phase, 60 Hz.
Dual Glycol Pump Package (Optional)
The dual pump package shall include pumps, enclosure, and field mounted flow switch. The pumps shall be wired to the drycooler
control box, which includes a lead/lag switch for the pumps. The standby pump shall automatically start upon failure of the lead pump.
Each pump shall be rated for ____ GPM (l/s) at ____ feet of head (kPa).
Piggyback Drycooler (Optional)
The system shall be supplied with a piggyback drycooler. The drycooler shall be constructed of steel with frame coated using the
autophoretic process, and panels powder coated to protect against corrosion. The coil shall be copper tube with aluminum fins. The
heavy duty fan shall be the centrifugal type, double width, double inlet. The 1750 RPM fan motor shall be mounted on an adjustable
base, and equipped with an adjustable motor pulley. The drycooler shall be designed for ____ ºF (ºC) ambient. The drycooler shall
have a _____ Volt, 3 phase, 60 Hz power supply.
SL-12020 (R 11/01)
Himod Guide Specification
Rev. 02
3.0 EXECUTION
3.1 INSTALLATION OF ENVIRONMENTAL OF CONTROL UNITS
3.1.1 General
Install environmental control units in accordance with manufacturer’s installation instructions. Install units plumb and level, firmly
anchored in locations indicated, and maintain manufacturer’s recommended clearances.
3.1.2 Electrical Wiring
Install and connect electrical devices furnished by manufacturer but not specified to be factory mounted. Furnish copy of
manufacturer’s electrical connection diagram submittal to electrical contractor.
3.1.3 Piping Connections
Install and connect devices furnished by manufacturer but not specified to be factory mounted. Furnish copy of manufacturer’s piping
connection diagram submittal to piping contractor.
3.1.4 Supply and Drain Water Piping
Connect water supply and drains to air conditioning unit. Provide pitch and trap as manufacturer’s instructions and local codes require.
3.2 Field Quality Control
Start up environmental control units in accordance with manufacturer’s start up instructions. Test controls and demonstrate
compliance with requirements.
SL-12020a (R 11/01)
SL-12020 (R 11/01)
Himod Guide Specification
Rev. 02